Mounting for valve tappets



June 1927 A. F. MILBRATH MOUNTING FOR VALVE TAPPBTS 2 Sheets-Sheet 1 Filed Jan. 19, 1925 A TTORNEYS.

wm\bpk\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\M QMMWM June 927 A. F. MILBRATH MOUNTING FOR VALVE TAPPETS 2 Sheets-Shoe 7" WWW ATTORNEYS Patented June 7, 1927;

j UNITED STATES AWE-H1111 1. HILBRATH, OF MILWAUKEE, WISCONSIN,

' manners-e FOR Application filed January This invention relates to improvements in mountings for valve tap ets.

The objects of invention'are to provide an improved mounting which may be readily removed and replaced and which Wlll have maximum eiiiciency and durability in service, and in which the alignments of the plungers will be preserved and; normal spring pressures maintained after removal to the same plane but showing a modified form of construction.

Figure 5 is a plan View of a portion of a removable casing section and associated mountings of the type shown in Figure 1.

Figure 4 is an inner face view of the same,

Figure 5 is a sectional view drawn on line 55 of Figure 4. V

Like parts are identified by the same reference characters throughout the several views.

The internal combustion engine illustrated in Figure 1 may be assumed to he of any ordinary type except as hereinafter specifically described. Each of the valve 1. tappet rods 1: is extended through a rela tively fixed spring seating-2 and the lower end is seated in a socketed plunger 4 hav-r ing depending ears 5 m which a earn-actuated roller 6 is journaled. The cam shaft 7 is provided with a cam 8 for each valve tappet, said cam being operative upon the associated roller 6 to lift it at the proper time for opening the valve 10 in the usual manner. Compression springs 9 in the plunger sockets: have their upper ends bearing against the seating 2 and these springs are therefore adapted to hold the rollers 6 in contact with their respective actuating cams.

The plunger 4 operates in a tubular guide vAivn TAPPETS.

19, 1925. ser1a1 No. 3,289.

member 12 connected by an integrally formed bracket 13 with a detachable casing plate 1%. The spring seating 2 is also connected with this bracket by bolts 16.

The late 14 is connected with the body 20 of t "e casing by bolts 21-, and as shown in Figures 1 and 2, this plateltis preten ably elongated and adapted to cover a slot in the crank casing body Wall 20 of sui ficient length to allow access to the cam shaft throughout the area occupied by the cams. In such case all of the mountingsi. e the guide members 12 with their as sociated plungers, rollers and a channel shaped spring seating 2 common to all of the plungers and their springsymay be sup ported from a single plate 1d. and removed therewith.

To remove the 1nountings,'the valve actuating levers will be depressed to open all of the valves 10 and allow the tappet rods 1 to be removed. Thereupon the cas ing plate lemay be unbolted and removed with a slight tilting 'movement which allows the mountings 'to be withdrawn through the slot. Owingto' the fact that all of the guide tubes 12 are supported from the plate 14 by connections which are either integrally formed or permanently connected with said plate, it is obvious that removals and replacei'nents of the mountings may be freely made without varying the adjustment or alignment of the parts;

In Figure 2 a plate 14* is employed Which is similar to that shown in I igure l, but which is provided with a bracket l3 sup porting a tubular guide member 5' which receives a plunger 30 in the upper end of which the valve tappet' rod 1 is socketed. A foot plate 31' is connected with the lower end of the plunger 30 and is adapted to be actuated by the cam 8 to transmit .motion to the associated plunger 30 and valve tappetrod 1. This plunger 30, with itstoot plate 31 represents an ordinary type of valve tappet mechanism known commercially as the mushroom type as distinguished from the roller type illustrated in Figure 1. Further description thereof is, therefore deemed unnecessary.

. Owing to differences in the structure of internal combustion engines, and for. the purpose of convenience in description, I refor to the body casing 20 as the cam shaft casing instead of designating it as a portion of the crank case, although in the specific structure illustrated the plate 14: is employed to cover a slot in an offset portion of the crank case which receives the cam shaft and the valve tappet mountings. In the appended claims this portion of the casing body therefore referred to as the cam shaft casing. It will also be understood that while I have illustrated and de scribed the plate it as an elongated plate to which all of the valve tappet mountings are secured, it is not essential whether the plate is formed in one piece or in sections with each section supporting one or more of the mountings. The preferred embodiment of my invention comprises a single plate with all the mounting brackets permanently" attached thereto or integrally formed therewith.

I claim- 1. The combination with an internal com bustion engine having valve tappets and a cam shaft provided with tappet actuating means, of slotted casing enclosing the cam shaft, cams and lower ends of the tappet rods; a plate adapted to close the slot in the cam shaft casing and provided with inwardly projecting brackets, tubular guides carried by the interior portions of said brackets, and "tappet'actuating plungers mounted in said guides and adapted to be actuated by associated cams on the engine cam shaft.

2. The combination with an internal combustion engine having a cam shaft and Valve actuatingcams thereon, of a cam shaft casing provided with an opening in one wall adapted to afford access .to all of the cams and associated portions of the valve actuating mechanisnna detachable plate adapted to be secured to the casing wall over said opening and guides for the lower portion of the valve actuatingmechanism connected with said plate and bodily removable therewith, whereby said plate with the associated guides and portions of the valve actuating mechanism may be removed andv replaced without changing their relative positions. j

3. In a valve actuating mechanism, the combination with a plurality of valve, tappet rods, of a set of guides for the lower endportion thereof, and a removable support for all of the guides of the set, adapted to facilitate the simultaneous removal ofaall the guides and associated tappet members tion with a cam shaft and cams, a canr shaft casing having a removable member provided with a guide supporting bracket, plunger guides carried thereby in position for normal registry with the cams on the cam shaft, a channel shaped spring seating supported from said bracket and extending over the guides; said seating being aper-- tured to receive tappet rods, coiled springs mounted in the guides with their upper ends bearing upon said seating, and cam actuated plungers also mounted in the guides with their upper ends bearing upon said springs; said removable member, bracket, 5; 'des, seating, springs and plunger-s being bodily removable and replaceable as a unit, whereby upon such replacement the original alignments and spring tensionwill be re stored. v H j 6, in a mounting for tappet actuating plungers, the combination with a set of permanently connected plunger guides, and

a spring seating common to all the guides and provided with apertures for the tappet rods, said seating being also permanently connected with the guides,

7. In a valve actuating mechanism, the combination with a plurality of valve tappet rods, of an enclosure for the lower end portions thereof having a removable section, a setof guides for the tappet rods secured to the removable section in fixed relation to each other, a spring seating cap member for said guides, secured thereto and provided with bearing aperturesfor thetappet rods, and tappet actuating plungers seat-ed in said guides, with compression springs interposed between them and said spring seating cap member, whereby the guides, cap member and plun 'ers may be removed with the casing section and replaced without alteration in the originalrpositions of thetappet rods 7 and tilungers. 

